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Affiliate Transactions (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Related Party Transaction [Line Items]  
Receivable from affiliate$ 0$ 831
Payable to affiliate0155
Cleco Power [Member]
  
Related Party Transaction [Line Items]  
Receivable from affiliate2,8022,738
Payable to affiliate7,3327,945
Cleco Power [Member] | Cleco Corporation [Member]
  
Related Party Transaction [Line Items]  
Payable to affiliate900 
Cleco Power [Member] | Support Group [Member]
  
Related Party Transaction [Line Items]  
Receivable from affiliate2,700 
Payable to affiliate6,400 
Cleco Power [Member] | Other Affiliates [Member]
  
Related Party Transaction [Line Items]  
Receivable from affiliate0 
Payable to affiliate0 
Cleco Power [Member] | Midstream [Member]
  
Related Party Transaction [Line Items]  
Receivable from affiliate$ 100